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Dual internal short range modem Tau/G703
Discontinued, recommended replacement is: Tau-PCI/2E1
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Features:
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The Tau/G.703 is an adapter board for IBM PC and compatible computers with ISA bus. It incorporates two G.703 short range modems and one digital interface for a standby link. The short range modems operate at distances of up to 2.5 km
The Cronyx-Tau software allows to join several physical synchronous communication channels into one logical channel. For example, two G.703 channels with data rate 2048 kbps, joined together, will create the logical channel with the overall throughput of 4096 kbps.
The Tau/G703 is discontinued and overrided by TAU-PCI/2E1/4E1.
| PC Bus Interface | |
|---|---|
| Bus Type | ISA, 16 bit |
| I/O Base Address | 200h - 3e0h, Jumper Selectable |
| I/O Address Space | 32 Bytes |
| Interrupts | IRQ 3, 5, 7, 10, 11, 12, 15, Software Selectable |
| DMA Channels | DMA 5, 6, 7, Software Selectable |
| DMA Transfers | Master Mode, Word Bursts |
| Addressable Memory | 16 Mbytes |
| Serial Interface | |
| Data Transfer Rate per direction for each channel simultaneous operation | 4 Mbps |
| Bit Rate Generator | Independent per channel per direction |
| Synchronous Protocol | HDLC |
| Asynchronous Transfer | 5-8 Bits/Character, 1/1.5/2 Stop Bits |
| Sync Mode Error Detection | Cyclic Redundancy Check CRC-16, CRC-CCITT |
| Async Mode Error Detection | Parity bit |
| Clock Options | TXCIN, RXCIN, TXCOUT or DPLL, Software selectable |
| Modem Control Signals | DTR, DSR, CTS, RTS, CD |
| G.703 Interfaces (2048 kbps) | |
| Data Transfer Rate | 64, 128, 256, 512, 1024 and 2048 kbps, Software selectable per channel |
| Line Code | AMI or HDB3, Software selectable per channel |
| Line Impedance | 120 Ohm (Twisted Pair) or 75 Ohm (Coax Cable), Jumpers selectable per channel |
| Receive Signal Attenuation Range | from 0 to 43 dB (up to 2.6 km of 22 AWG twisted-pair cable) |
| Line Attenuation Monitoring | 4 Levels: 0 dB, -9.5 dB, -19.5 dB, -28.5 dB |
| Jitter Attenuator | 32 bits depth, in the receive path |
| Error Detection | Bipolar Violation |
| Board Size | Height: 100 mm, Width: 167 mm |
| Operating Systems and Protocols | |
| Linux | PPP, Cisco/HDLC, Frame Relay |
| FreeBSD 4.x, 5.x, 6.x (FreeBSD 7.x is not supported) |
PPP, Cisco/HDLC, Frame Relay |
User's Manual in Russian
Driver Development Kit Manual in Russian
V.35 cable scheme
RS-232 cable scheme
Справочник по интерфейсным кабелям Cronyx.
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